The re-leaf or pressure grooves make a big difference. The bearing surface and alloy are a factor too. Longer bearing surface higher pressures. Higher or pure copper alloys can increase pressures but hard to generalize about this as it is a friction factor and how much obturation or bullet upset that takes place. Probably several other factors in there I am not aware of.
Bottom line is extrapolation is a fools errand, I do know about this from lots of experience, as an errand boy.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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